.err{
    width: 100%;
    height: 100%;
    background-color: #333333;
    min-height: 498px;
}
.btn{
       width: 160px;
       height: 58px;
       background-color: #1cb5f0;
       border-radius: 16px;
       margin: 20px auto;
       display: flex;
       align-items: center;
       justify-content: center;
       color: white;
       cursor: pointer;
       font-size: 19px;
       font-weight: 500;
     
}
.img{
       width: 728px;
       height: 416px;
}